London-based investment firm Pemberton Asset Management acquired the auction house for an undisclosed amount.
Plumb Club Adds Three New Members
The supplier organization boosted its membership count ahead of the upcoming JCK Las Vegas jewelry trade show.

Englewood, N.J.—The Plumb Club is welcoming a few new faces ahead of the upcoming JCK Las Vegas jewelry trade show: Carl K. Gumpert Inc., Indigo Jewelry Inc. and iStar Group.
Carl K. Gumpert, a Los Angeles-based fine jewelry manufacturer and diamond supplier, has been part of the jewelry industry for more than 70 years, specializing in “Forever Classic” wedding sets, bands and other jewelry.
Indigo Jewelry Inc., part of the S. Vinodkumar Group of companies, is a diamond and jewelry company with a global presence and a focus on market analysis.
“Upon reviewing the value of trade shows to our company and customers, we recognized that associations like The Plumb Club have the vision to adapt to the evolving market and create tremendous value, not only for its members but for the industry at large. We could not be more thrilled to be part of the Plumb Club,” said Indigo Jewelry CEO Jay Mehta.
The iStar Group is comprised of Stanley Creations, Candela Jewelry and Roman and Sunstone, which are manufacturers of fine, fashion, bridge and costume jewelry.
“It’s an honor to be included amongst the great companies that comprise the association, and we feel that this is a natural partnership. We look forward to long-term membership,” said iStar Group President Toney Cheng.
Notable members of the Plumb Club include Citizen Watch Company of America and Bulova.
More information about the Plumb Club can be found on its website.
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